V90 L6-2.9L VIN 96 B6304S (1998)
Cabin Temperature Sensor / Switch: Description and Operation
In Car Temperature Sensor - Electronic Climate Control
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Interior temperature sensor is resistor of the NTC (negative temperature coefficient) type, the resistance of which falls with rising temperature. The
resistance is 9.9K Ohms at 25 °C (77 °F).
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Located in the roof light, measures the temperature in the passenger compartment at head level. The device is ventilated by means of a tube from
the intake manifold, through which air is drawn through the sensor
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The system FUNCTIONS even if a sensor is faulty. To prevent the entire unit from being disabled if a sensor becomes faulty, the system is
programmed to continue operating in a more or less normal manner in this event. However, it will react more slowly and will control the
temperature less precisely. The A/C button will FLASH to indicate the presence of a fault.
